src/System.Private.CoreLib/shared/System/Threading/EventWaitHandle.cs

   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information.
   4
   5 using System;
   6 using System.IO;
   7
   8 namespace System.Threading
   9 {
  10     public partial class EventWaitHandle : WaitHandle
  11     {
  12         public EventWaitHandle(bool initialState, EventResetMode mode) :
  13                         this(initialState, mode, null, out _)
  14                 {
  15                 }
  16
  17         public EventWaitHandle(bool initialState, EventResetMode mode, string name) :
  18             this(initialState, mode, name, out _)
  19         {
  20         }
  21
  22         public EventWaitHandle(bool initialState, EventResetMode mode, string name, out bool createdNew)
  23         {
  24             if (mode != EventResetMode.AutoReset && mode != EventResetMode.ManualReset)
  25                 throw new ArgumentException(SR.Argument_InvalidFlag, nameof(mode));
  26
  27             CreateEventCore(initialState, mode, name, out createdNew);
  28         }
  29
  30         public static EventWaitHandle OpenExisting(string name)
  31         {
  32             EventWaitHandle result;
  33             switch (OpenExistingWorker(name, out result))
  34             {
  35                 case OpenExistingResult.NameNotFound:
  36                     throw new WaitHandleCannotBeOpenedException();
  37                 case OpenExistingResult.NameInvalid:
  38                     throw new WaitHandleCannotBeOpenedException(SR.Format(SR.Threading_WaitHandleCannotBeOpenedException_InvalidHandle, name));
  39                 case OpenExistingResult.PathNotFound:
  40                     throw new DirectoryNotFoundException(SR.Format(SR.IO_PathNotFound_Path, name));
  41                 default:
  42                     return result;
  43             }
  44         }
  45
  46         public static bool TryOpenExisting(string name, out EventWaitHandle result)
  47         {
  48             return OpenExistingWorker(name, out result) == OpenExistingResult.Success;
  49         }
  50     }
  51 }